作者:Takeo Sakai、Ayumi Fukuta、Kumiko Nakamura、Masato Nakano、Yuji Mori
DOI:10.1021/acs.joc.6b00484
日期:2016.5.6
A total synthesis of brevisamide, a marine monocyclic ether amide isolated from the dinoflagellate Karenia brevis, has been achieved in 18 steps starting from 4-(benzyloxy)butanol. The synthesis involves oxiranyl anion coupling between an epoxy sulfone and a triflate, intramolecular etherification of a hydroxy-bromoketone, diastereoselective introduction of the axial methyl group by hydroxyl-directed
从4-(苄氧基)丁醇开始,已从18个步骤中实现了从短鞭毛藻短毛猴分离出的海洋单环醚酰胺-布雷维酰胺的全合成。合成过程涉及环氧砜与三氟甲磺酸酯之间的环氧乙烷基阴离子偶联,羟基溴酮的分子内醚化,环外烯烃的羟基定向加氢非对映选择性地引入轴向甲基以及通过亲核取代而安装乙酰胺侧链一个ñ -乙酰基氨基甲酸叔丁酯。使用Horner-Wadsworth-Emmons反应组装二烯侧链以完成合成。